Liner musik instrumenten fabrik



(No Model.) 3 Sheets- Sheet l.

C. PIBTSCHMANN.

MECHANICAL MUSICAL NSTRUMENT.

No. 447,970. Patented Mar. 10, 1891.

3 Sheets-Sheet 2.

(No Model.)

C. PIETSCHMANN,

MECHANICAL MUSICAL INSTRUMENT.

NC. 447,970. Patented Mar. l0, 1891.

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C. PIETSGHMANN.

MECHANICAL MUSICAL INSTRUMENT.

No. 447,970. Patented Mar. 10,1891.

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CARL PIETSOHMANN, OF PANKOV, NEAR BERLIN, ASSIGNOR TO THE BER- LINER MUSIK INSTRUMENTEN FABRIK, AKTIEN GESELLSCHAFT, VOR- MALS OHAS. F. PIETSOHMANN d: SOHNE, OF BERLIN, GERMANY.

MECHANICAL MUSICAL INSTRUM ENT.

SPECIFICATION forming part of Letters Patent No. 447,970, dated March 10, 1891.

Application led September 29, 1890. Serial No. 366,518. (No model.) Patented in Germany January 29, 1889, No. 50,193; in

France February 9, 1889. No. 195,974 g in England February 26, 1889, No. 8,395, and May 23, 1890, No. 8,097, and in Austrie-Hungary August 26, 1889, No. '7,853 and No. 40,183.

T @ZZ whom it may concern:

Be it known that I, CARL PIETSCHMANN, of Pankow,nearBerlin,Prussia, Germany, a citizen of the German Empire, have invent-ed certain new and usefullmprovements in Mechanical Musical Instruments, (for which I have obtained Letters Patent in Germany, No. 50,193, dated January 29, 1889; in England, No. 3,895, dated February 26, 1889, and No.

ro 8,097, dated May 23, 1890; in France, No.

195,974, dated February 9, 1889, and in Austria-I-Iungary, No. 7,853 and No. 40,183,dated August. 26, 1889, issued July 121890,) of which the following is a specification.

[5 This invention relates to improvements in that class of mechanical musical instruments in which the reeds are vibrated by suction and the valves of the reed-chambers are operated by a perforated sheet. Heretofore 2o mechanical musicalinstruments have usually been provided with perforated music-sheets secured to rollers, the sheet being unwound from one roller upon the other. Endless music-sheets have also been used, but these ne- 2 5 cessitated complicated mechanism.

The object of my invention is to provide a mechanical musical instrument in which an endless music-sheet can be used, which instrument is simple in construction, can easily be operated, and easily adjusted.

The invention consists in the combination, with a suitable casing containing a vacuumchamber and bellows connected therewith, of valves for closing openings leading from the 3 5 vacuum-chamber to the reed boxes, key-levers for operating said valves, and rods or wires passing from the key-levers through apertures in a suitable diaphragm to the valves.

The invention also consistsin the construction and combination of parts and details, which will be fully described hereinafter, and finally pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical transverse sectional view of my improved mechanical musical instrument. Fig.

2 is a vertical longitudinal sectional View of the same. Fig. 3 is a vertical longitudinal sectional view of an instrument of this kind,

in which the valve mechanism is containedin a casing attached to the side of the vacuum- 5o chamber. Fig. 4 is a transverse sectional view through the valve-casing, and Figs. 5 and G are detail sectional views showing modifications of the said mechanism.

Similar letters of reference indicate corre- Spending parts.

The endless music-sheet E that is used for operating the valve is shifted by means of a rubber-covered roller g, which is turned by means of a crank in the usual manner or by 6o means of any other well-known mechanisms. The endless music-sheet E passes through a longitudinal opening Bin the casing A of the instrument. The valves e for closing the openings in the reed-chambers .a are secured to levers d, pivoted within a hermeticallyclosed chamber C,which is connected by chambers Z with the suction-bellows D, arranged in the bottom of the casing A, and connected by rods f with a suitable crank-shaftf, which is 7o also used for turning the rollers g. On the valve-levers d the springs e act and press upward those ends of the levers d opposite the ends carrying the valves e, thus tending to keep the valves open. A series of pivoted levers ct are provided at their upper ends with toes a', which project through an opening dgn in the top of the casing A, upon which toes the music-sheet E can act. Each lever d is provided with an arm d3, connected by rods b with those ends of the levers d opposite to the ones carrying the valves e. To prevent any escape of air, the rods h pass through apertures in the diaphragm c, secured on the top of the vacuum-chamber C. Then the slot or opening in the music--sheetE arrives at one of the toes a of the levers o, said toe passes into a slot in the sheet and the corresponding spring e presses upward that end of the corresponding lever d opposite to the one carrying the valve e, whereby the corresponding reed-box is brought into communication with the vacuum-chamber O, and the exterior air passing th rough the reed-box into the vacuu mchamber C vibrates the reed, thereby produc- 9 5 ing the required sound. The bellows D constantly maintain an ordinary vacuum in the vacuum-chamber C as said chamber is connected with the bellows of the intermediate chambers Z.

In the modification shown in Figi 5 the springs c are dispensed with and the levers d are connected with the levers d by springarms 7c passing through apertures in a diaphragm c. Ordinarily when the sheet E rests upon the toes a of the levers a the springarme 7c are under sufIicient spring-tension to keep thev valves e closed. When one of the toes a arrives at a slot in the sheet E, the correspondinglever a is forced upward by the spring-tension in the connecting spring-arm lo and the valve is opened. This construction has the advantage over the construction shown in Figs. 1 and 2 that the springs for keeping the valves closed or for closing them can readily be adjusted without requiring the vacuum-chamber'to be opened, as is necessary in the constructions shown in'Figs. 1, 2, 3, and 4.

In the modification shown in Fig. 6 the springs e are provided in the man ner set forth previously, and the levers d are provided with a iiat extension m', upon which the lower ends of the wires b can rest loosely, said wires being adapted to pass through an aperture in the diaphragm c in the usual manner. The wires b also pass through a guide-eye m, formed on the end of an arm of the lever d for the purpose of guiding the'lower ends of said wires b directly upon the plate kor extension m. The wires b are bent to give them spring-tension, and are not positively connected with the levers d. Whenever it is desirable or necessary to adjust the valves or the-motion of the same, all that is necessary is to rem'ovethe cover of the instrument and to adjust the spring-wires b.

Having thus described'my invention,I claim as new, and desire to secure by Letters Patent- I. In a mechanical musical instrument, the combination, with a casing having-a vacuumchamber, a bellows-chamber below the same containing bellows for creating a vacuum'in said vacuum-chamber, reeds above the Vacuum-chamber, valves in said vacuum-chamber for closing the reed-boxes, and mechanism for operating said valves, which mechanism is adapted to be operatedbyaperforated musicsheet, said casing having an opening extending from end to end zbetween the bellowschamber'and the vacuum-chamber, through which opening the endless music-sheet can pass, substantially as set forth.

2. The combination, with a casing having a vacuu n n-chamber, valve-levers in the vacuumchamber,keyleve1's for operating the valvelevers and arranged above the vacuum-chamber, mechanism for operating the key-levers," detachable `rods extending from the key-levers to the valve-levers and resting loosely on the same, and apertured diaphragms, through which said rods pass, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

CARL PIETSCHMANN.

Witnesses;

W. WITTIG,

G. WINKELSTEIN. 

